2024 - Day 1 part 1 - rust

-- init rust setup

.gitignore

@@ -1,2 +1,3 @@
 .idea
 *.swp
+.vscode

2024/rust1/.gitignore

@@ -0,0 +1,2 @@
+target
+Cargo.lock

2024/rust1/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "rust1"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

2024/rust1/src/main.rs

@@ -0,0 +1,31 @@
+use std::io::{BufRead, BufReader};
+use std::fs::File;
+
+fn main (){
+    // let filename = "../1/input_example.txt";
+    let filename = "../1/input.txt";
+    let file = BufReader::new(File::open(filename).expect("Unable to open file"));
+    let mut accum: u32 = 0;
+
+    let mut list1: Vec<u32> = vec![];
+    let mut list2: Vec<u32> = vec![];
+
+    for line in file.lines() {
+        let wline = line.unwrap();
+        let nums: Vec<&str> = wline.split(' ')
+            .filter(|&x| !x.is_empty())
+            .collect();
+
+        list1.push(nums[0].parse().unwrap());
+        list2.push(nums[1].parse().unwrap());
+    }
+
+    list1.sort();
+    list2.sort();
+    let zlist = list1.into_iter().zip(list2);
+    for t in zlist {
+        accum += t.0.abs_diff(t.1);
+    }
+
+    println!("{}", accum);
+}